Hioki MR8740-50, Инструкция по эксплуатации

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52
Configuring Measuring-Module-Specific Settings
4
Click the [Threshold] box, and then enter a threshold value.
• Measured values are acquired based on the following: the interval between the subsequent two points
when measured waveform exceeds (or falls below) the threshold value, and the number of times when the
waveform exceeds (or falls below) the threshold value.
• The upper and lower limits of the threshold value and the increment in the threshold value vary depending
on the input voltage setting.
To prevent measurement errors due to noise, a hysteresis width of about 3% of the input voltage is tolerated
for the threshold.
(When
[Input voltage]
is set to
[±10 V]
, it stands at about ±0.3 V.)
Specify a threshold allowing for tolerance that exceeds the hysteresis width relative to a peak voltage.
5
Click the [Slope] box, and then from the list, choose a signal direction to be detected.
 Detects a waveform when it exceeds the specified threshold value (in the positive
direction).
Detects a waveform when it falls below the specified threshold value (in the negative
direction).
6
Click the [Division] , and then enter a pulse count used for calculating frequency.
1
 to
4,096
Example: For an encoder that outputs 360 pulses per rotation, set
[Division]
at
[360]
to measure a frequency
each rotation. When [Division] is not used, set it at [1] .
7
Click the [Timing] box, and then from the list, choose a condition used for starting a count.
Only when [Mode] is set to [Count] , this setting is available.
Start  Clicking the start icon starts accumulating.
Trigger Starts a count when the instrument is triggered.
• When [Timing] is set to [Start] , some internal processing time is required between the time when the start
icon is clicked and the start of a measurement. Thus, the count value is not zero at the start point.
• When the [Timing] is set to [Start] , an input that exceeds the trigger level does not trigger the instrument
while the instrument is filling the pre-trigger memory. Furthermore, the time for internal processing at the
start and the trigger priority setting may not cause the instrument to trigger even when the input signal
exceeds the specified trigger level.
• The memory division may cause the last data of the previous block to remain in the top of the block.
8
Click the [Count over] box, and then from the list, choose an action to be performed when a
count number is saturated.
Only when [Mode] is set to [Count] , this setting is available.
Hold
 Counts pulses and stops counting when the pulse count reaches the upper limit (65535
for the 40 k range).
Undo Starts counting pulses and brings the count back to zero when the pulse count reaches
25 times of the range figure (50000 for the 40 k range).